51×71+51×27+49×98这道题怎么巧算?
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先观察,第一项和第二项有相同的乘数51,提出公因式,求和后再做乘法,具体计算方法如下:
51x71+51x27+49x98
=51x(71+27)+(50-1)x98
=51x98+49x98
=(51+49)x98
=100x98
=9800
望采纳,谢谢!
51x71+51x27+49x98
=51x(71+27)+(50-1)x98
=51x98+49x98
=(51+49)x98
=100x98
=9800
望采纳,谢谢!
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51*71+51*27+49*98
=51*(71+27)+49*98
=51*98+49*98
=98*(51+49)
=98*100
=9800
望采纳,谢谢
=51*(71+27)+49*98
=51*98+49*98
=98*(51+49)
=98*100
=9800
望采纳,谢谢
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解:简便运算如下:
51x71+51x27+49x98
=51x(71+27)+49x98
=51x98+49x98
=98x(51+49)
=98x100
=9800
51x71+51x27+49x98
=51x(71+27)+49x98
=51x98+49x98
=98x(51+49)
=98x100
=9800
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51×71+51×27+49×98
=51x(71+27)+49x98
=51x98+49x98
=(51+49)x98
=100x98
=9800
=51x(71+27)+49x98
=51x98+49x98
=(51+49)x98
=100x98
=9800
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
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